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A metal-free multicomponent coupling reaction of aliphatic amines, formaldehyde, organoboronic acids, and propiolic acids has been reported for the synthesis of diverse propargylamines. This transformation involves a MCR 2 of PBM and decarboxylative three-component coupling reactions.
A simple and efficient synthesis of fused morpholine pyrrolidine/piperdine core structures was accomplished via a Petasis-borono Mannich reaction of cyclic amino alcohols, glyoxal and arylboronic acids with moderate to good yields. The bioassay data showed that the synthesized compounds displayed selective insecticidal activities against armyworm and root-knot nematode.
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